I have text field on a sql server table and I retrieve it on string variable using datareader : string result = reader["MyTextfied"] but I have this errors ( text or binary field cannot be troncated ) My text fied contains a large of text
I want to do paging the API Membership without using the datacontrols, but I get this error "Unable to cast object of type '<TakeIterator>d__3a`1[System.Char]' to type 'System.Collections.IList'." when I do this,
I dont know what I have done but my add blog or news item functionality is broken. It works fine locally but not on the server (.net 3.5 mvc 2 I believe).
[Code]....
The interesting thing is the path P:Web_DevelopmentAHNDEVControllersAdministratorController.vb. This is my local path on my machine but not the
I am having a lot of the same issue as this poster did with errors on initializing type.
I am trying to learn linq and am about ready to give up - don't get how this is easier...
I'm trying to do a simple update to product names in the product table based on the manufacturer ID
In order to do this I am looping through each record. I was initally successful with changing all names in the column but when I try to query the data, I continually run into multiple problems.
The following poster has had the same issue I have but his solution isn't working for me.
[URL]
I keep getting the same error on the opening bracket on the select statement in the SelectByManufacturerID function...
Error 1 Cannot initialize type 'DataBaseDataManagement.ProductName' with a collection initializer because it does not implement 'System.Collections.IEnumerable'
Button that does the actual updating...
[Code]....
The function that the button calls to get the query... ERROR
Calling Index view is giving me this very very annoying error . Can anybody tell me what to do about it
Error:The model item passed into the dictionary is of type 'System.Collections.Generic.List1[MvcApplication13.Models.Groups]', but this dictionary requires a model item of type 'MvcApplication13.Helpers.PaginatedList1[MvcApplication13.Models.Groups]'.
public ActionResult Index(int? page) { const int pageSize = 10; [code].....
i have a datareader who read from data field from sql server, this field is datetime format now, when this field is null it returns 01/01/1900!! how can i manage it without if or some check, is there a property in datareader or sqlserver properties who i can return null value from datetime field?
I use a SqlDataReader to get fron sqlServer a row af a table. This table have a text field where I store a Xml configuration. In one case this Xml grow up to 650Kb. When I get the field from the datareader it cost amost 2 seconds:
INFO 2010-04-16 09:46:40,559 [12] Cms.dataContenido - readed INFO 2010-04-16 09:46:42,356 [12] Cms.dataContenido - XMLContent
I have a table with just a column and a row in a table that it save just a file with size 1.5 GB ! C# application and sql server are in different machines. I want to read that file by DataReader every 100 MB then save all 100 MB files to disk by "FileMode.Append" for file stream and collect them to one file.
first of all, sorry if my title isn confusing as i dont really sure the specify description regarding what i wan to do. Now what i trying to do is, I getting 5 random images from the database, this is the code for me to get random 5 records from database:
[Code]....
I dont really know how to use array but willing to try if it is needed.
At debug time I would like to see what are the keys in my InitParams collection - I can't seem to be able to list them.
EDIT:As Jon suggests below, this might be a bug within the Silverlight debugger. To reproduce, just create a new Silverlight Application within Visual Studio 2010 and just edit code
{ public partial class MainPage : UserControl { [code]...
I was thinking about the fastest way to retrieve a "set" of objects related to a specific user. For instance, if I was to create a website similar to Flickr where people upload lots and lots of photos(jpegs) what would be the fastest way to be able to retrieve those photos from the SQL Server database. Scenario 1: You store metadata about each file they upload to the website as a single row in a database table. Then when you want to retrieve a specific users uploaded files you simply scan the database file for every row matching the UserID and store them in memory.
This, of course, gets all the information about all the photos a single user has uploaded. My concern with this approach is when the user activity goes from a few thousand to being in excess of a million.
This approach seems fine for a small website but does this method work for a million plus user website like Flicker or MySpace? When you have a million users and millions more photos does this approach still perform at acceptable speeds?
create a collection in memory of "ALL" the PictureIds' for a single user and store them in-memory, in a collection and then save this collection as a single VARBINARY(MAX) field in the SQL Server Database. So instead of having to find multiple records in the Photos database you would simply need to find one, which would include all the PhotoIds' that belong to the user. In essence, translating into the phrase, "If you find one, you have found them all". And improving server performance by leaps and bounds. I only have about a year experience in working with SQL Server and ASP.NET so Im not sure if this solution is practical, if its already been tried, if it can be done.
I'm trying to read data from a text file into a DataReader object using the following code but I get an exception:
OleDBException was unhandled.
Cannot update. Database or object is read-only.
Also, I would like to know if it is efficient to read data of a text file into a datatable instead of using StreamReader object and traversing through the recordset.
However, when I try to build the control I'm getting the error as shown in the subject. I've tried searching, and it seems the signature for the original function matches the one I have, and all other solutions I've seen uses the same signature.
I'm having a method that exports content from the database to excel files. The method taks as paramaters a DataReader param and a int param - the number of rows. For the number of rows i'm using a dataset, wich i fill using the same query as for the datareader. So I'm executing it twice... Is there a way I can avoid that? get the number of rows from the datareader?
I am getting an error that an open DataReader associated with this Command, when I'm not using datareader(though probably executereader() is the same thing) how would I close this if I don't have a datareader present?
using (SqlConnection conn = new SqlConnection(ConnectionString)) { SqlCommand cmd = new SqlCommand("spSelectAllTypes",conn); cmd.CommandType = CommandType.StoredProcedure; [code]...
I just want to be able to databind a bunch of dropdownlist in one open connection. (before I had multiple open and closes for each control)
I have in my database the News Table which consist of => Id, Title, txt . I need to be able to get a description text from the whole text which exist in txt Field , but without any codes like <...> , just a pure text !! how can I do this?
I have an old database that still contains depreciated Text fields. I need to pull from these fields and display the results. You would think this should be easy... First my select statement caused a problem:
Code: SELECT DISTINCT ..., CustomerInstructions, ... FROM Orders where CustomerInstructions is a Text field.
The error I get: "The text data type cannot be selected as DISTINCT because it is not comparable." A quick search shows I can cast the text field as a varchar(max).
Code: SELECT DISTINCT ..., CAST(CustomerInstructions AS VARCHAR(MAX)), ... FROM Orders
Now I get an error while trying to load the instructions into a text box: "Specified argument was out of the range of valid values. Parameter name: index"
Not sure what the problem is here. I have text and a text box. What's with the "out of range" crap?
I'm trying to insert userid that is a System.Guid into an additional table into the same userid field that is uniqueidentifier. It seems as it cannot insert the System.Guid type there wether I'm passing it directly as the System.Guid or as a String then converting.
<System.ComponentModel.DataObjectMethodAttribute _ (System.ComponentModel.DataObjectMethodType.Insert, True)> _ Public Function InsertUserInterests( _ ByVal strUserId As String, ByVal strCode As String) _ As Boolean Dim userInter As New DS1.tblUserInterestsDataTable Dim userInterRow As DS1.tblUserInterestsRow = userInter.NewtblUserInterestsRow Dim ug As System.Guid = New Guid(strUserId) userInterRow.UserId = ug ' This didn't go through I beleive userInterRow.InterestCode = strCode userInter.AddtblUserInterestsRow(userInterRow) Dim rowsAffected As Integer = Adapter.Update(userInter) Return rowsAffected = 1 End Function
I have 3 issues that I am attempting to resolve in development with using an aspx page to send email (both internal and external).1. Using the ddl.SelectedValue for the To email address doesn't send the email to the person, but will still cc and bcc the hard-coded recipients. If I replace the(DropListVendor.SelectedValue.Trim()) withmyemail@chuckanddons.com it sends just fine. However I need my users to be able to select which vendor to email, hence the Drop Down list for Vendor. I'll post my code below.
I have a datatable for which i'm defining a dataadapter. I'm specifying an updatecommand with sqlparameters for the dataadapter I set the updatecommand's parameters using the following overload:
[Code]....
The length 16 is used because this is the length of the field according to sql (the image datafield is a pointer of size 16) I noticed .Net is actually truncating the string because of the length i'm setting. An image of size 3kb will properly upload if we set the length field to be greater than 3kb The question I have is what is the proper value (or strategy) to use in order to set for the length field so that ALL images will properly update to the database, with each using the appropriate size.
I guess i could theoretically set the length to be maxint, but this seems sloppy. Looking at sqlparameter documentation i didnt see an 'unlimited' or 'default' length i could set, which would allow each update statement called to use the appropriate size for the data length for that row.
